Brand new, SUNNY automatic pressure switch for compressed air systems. Automatically turns electric motor ON or OFF at set values. Adjustable differential. Unloader port 1/4" OD copper tubing which allows compressor to start without back pressure load. Sturdy plastic housing. Manual off switch. Four port.
What is the tubing size needed for the unloader? 1/4", 3/8", 5/16"?
A: These are made for standard 1/4" o.d. tubing.
Date Submitted: 12/04/2018
What is the voltage range for the input coil voltage? Will it work with both 120 VAC and 230 VAC?
A: There is no coil to apply voltage to. These are controlled by a diaphragm which activated the contacts in relation to pressure. The contacts are rated for both 115 or 230 at the current limits in the specifications.
Date Submitted: 04/01/2018
does this switch have an unloader built into it or would I need to install an unloader on the unloader port?
A: It does have the unloader valve. Just needs a copper line running to the line between the compressor head and the check valve as the air enters the tank.
Date Submitted: 09/08/2015
Is this 3 Phase?
A: This has only 2 sets of contacts instead of 3 that would be needed for 3 phase motors.